When did we learn this behaviour? Does it indicate higher thought/intelligence? We teach our children to tie knots at a very young age, so knots must be important right? Which other animal can tie knots? Is knot making just another form of weaving?
And lets say we do build an AI that resembles human nature/consciousness closely, can it tie knots? Maybe an AI is only valid if it can introspect, love, hate, philosophize, do math and.. tie knots! What about knitting/crocheting?
Maybe weaving (knot-making/knitting etc) is/was just as important as discovering/understanding fire. Imagine our primate ancestors, just chilling in a jungle somewhere and weaved some pieces of plant fibers together and some lightbulb went on in their heads.. and they continued making them and adjusting them and found useful uses for them (or maybe they just enjoyed the pattern or the effect of pulling one string and the whole knot comes undone - Wow!).
Knots sure are interesting!